Material bag

Abstract

A material bag includes a bag body and a sleeve on the bag body. A periphery of an opening of the sleeve is provided with a plurality of flexible tabs. An interval is defined between every two of the tabs. The tabs are separated from each other by the interval and connected to the periphery of the opening of the sleeve, so they can be independently flipped to form force-bearing faces to be clamped by a clamping device. When the folded material bag is used for powder/particle material packaging, the clamping device will act on the tabs for clamping the sleeve of the material bag. The clamping device can complete the transfer of the material bag and the connection between the sleeve of the material bag and a filling cylinder.

What is claimed is: 
     
       1. A material bag, having a bag body; the bag body having a filling space therein for filling powder/particle materials, a material inlet above the filling space, and a flexible thin sleeve extending from an upper end of the material inlet, the sleeve being extendable to be fitted onto a filling cylinder, wherein a periphery of an opening of the sleeve is provided with a plurality of flexible tabs and an interval is defined between every two of the tabs; and wherein each tab is a rectangular platy woven tab, having a long seam side and a flipable outer side opposite the seam side, the seam side is fixed to the periphery of the opening of the sleeve by sewing stitches, so that the opening of the sleeve is restricted by the seam sides of the tabs to form a polygonal opening. 
     
     
       2. The material bag as claimed in  claim 1 , wherein the flipable outer side of each tab is reversely folded and sewn to form an edge banding portion.